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' A. C. HODGE. SEPARABLE PULLEY.

No. 519,331. Patented May 8,1894.

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ALEXANDER O. HODGE, OF MENASHA, W'ISCONSIN.

SEPARABLE PlJ LLEY.

SPECIFICATION forming part of Letters Patent No. 519,331, dated May 8,1894- Application filed May 15, 1898. sennmmazts. (NomodeL) i To allwhom it may concern.-

same can be easily and nicely applied to a shaft or to a line ofshafting.

To this end the invention consists of the device described and claimedin this specification, and illustrated in the accompanying drawings, inwhich i Figure 1 is an end elevation of my complete device. Fig. 2 is aside elevation. Fig. 3 is an end elevation of the pulley with theseparable parts removed. Fig. lis aview of the removable block. Fig. 5is a side elevation of the locking-pins for the removable block. Fig. 6is an end elevation of the same. Fig. 7 is an end elevation of theremovable piece of the pulley-rim. Fig. 8 shows the tightening blocksfor the pulley-rims, and Fig. 9 is a view illustrating the washer thatis used to hold the removable the pulley.

Referring to the drawings and in detail, it will be seen that myinvention consists in taking a pulley of any desired size or shape,

rim-section in place in as shown in Fig. 1, and in constructing the sameas follows.

In the drawings, A represents the pulleyhub, which has a suitable holeH, wherebythe pulley can be fastened to the shaft. The hub A isconnected to the rimB bymeans of the usual arms 0. I cut a section ofthe hub away, and make the same a removable piece as D. This removablepieceD has extending arms 10 which fit into guide-ways or slots 12 inthe pulley-hub A, as shown, and by this means, the complete hub isformed.

Out in the side of the pulley-hub A are tapered holes 13, which are socentered that they will form a recess, as shown, the mouth of which isnarrower than the center.

lar holes 11 are cut into the removable block D, and it will be seenthat when the block D is in place, the holes 11 and 13 practically forma tapered dove-tail. I form these holes 11 and 13 on each side of theremovable block D and of the slot into which the removable block fits,for a purpose hereinafter described. Adapted to fit into these holes 11and 13 thus formed, are peculiarly shaped pins D, as shown, which pinsconsist of an integral piece comprising two conical shaped pieces 15 and16, which are made to fit the holes 11 and 13, and an extendedscrewthreaded shank 17, which is arranged in the center of the piece, asshown. I W hen the pins D are inserted into the holes 11 and 13, the

piece 15 will engage the hole 13,and the piece 16 the hole 11, and asthe same is firmly inserted into the hub, it will draw the removablepiece D firmly in place to bite the shaft; and .will firmly draw theendsof the cut-away por- The block D is clamped to both sides of the slot inthe hub so that the hub will be tightly pulled together, and thecomplete hub firmly held in any direction. The pins D are, therefore,practically, a double dove tail in cross section; and any shape whichwill give this double dove-tail so as to engage both parts to pull themtogether, is within the scope of my invention. The rim D has theremovable section E, and in this removable section E are formed partialconical-holes 21, which mate with partial conical-holes 20 formed in therim B, as shown in Fig. 2, there being as many of these conical-holes 20and 21 as desired, depending upon the width of the face of the pulley.Fitting into these holes 20 and 21 are the peculiarly shaped pins E,which consist of two sections 22, 23, which are made conical, as shown,and which sections fit into the conical holes. These pins E haveextending screw threaded shanks 24, under which are placed washers 26,and upon which are fitted nuts 25. The washers 26 have holes 27 toaccommodate the screw-threaded shanks 24, and the washers, when inplace, act as separable rim E into place. It will be seen parts, whichthey connect,

that these pins E are double dove-tailed in cross section, and that theywill act in the same manner as the pins D, in drawing the together, and,of course, any other shape, that will accomplish the same function, maybe used. In some cases, I intend making the separable rim E and theseparable block D in one piece, and connecting the same together byapulley-arm as shown in dotted lines in Fig. 1.

My pulley may be made in various ways: One economical way to make thesame is to turn up a pulley in the usual manner, and then to cut the'rimE and the block Dout of the pulley; or another way is to make theseparable rim and separable block D and the pulley in separate pieces,and plane them up, and

the pulley out, and fit them. It will be seen that two jointing boltsare used in connection with the separable piece D, so that the hub Awill be drawn tightly together in both directions. This will, in mostcases, clamp the pulley tight enough on the shaft to avoid the use ofkeys or similar devices, although, in some cases, I may use the ordinarykey to hold the pulley in place on the shaft, if so desired. Thejointing bolts for the separable rim are made tapered enough so as todraw the rim tightly together, the washers acting as flanges, as beforedescribed. It is a very economical way to make the jointing bolts bothfor the hub and the rim in the form of a double cone, as described, asthe holes into which they are to fit can be very easily and nicely madeby means of tapered reamers. I have found in actual practice that apulley constructed in this manner is fully equal in strength to a pulleycast solid, and by using the jointing bolt there is less chance ofsplitting the hub than in connection with the ordinary separable pulley.

The tapered shape of the jointing bolts makes a better fitting than theheaded bolts used in the ordinary pulleys, and the same leaves no sharpedges on the outside of the pulley to cut the belt.

One way my pulley is applied is as follows: The removable block D andthe removable rim E are simply put in place after the main part of thepulley has been placed upon the shaft, and thereby the pulley is lockedto the shaft. The shape of the jointing bolts may, of course, be varied,the broad scope of my invention contemplating any means; but, as beforestated, I prefer the conical double shape.

While I have shown the separable part of the hub and the separable rimas considerably smaller than the main portion, still itis within thescope of my invention to make the removable part of the hub and rim, ifdesired, the same size as the main part of the pulley, when my inventionwill truly be a split pulley; and some of my claims are broad enough tocover this construction, but it is preferred to make the separable partof not get twisted or displaced. For that reason, I preferably make theremovable parts of just about width enough to let the shaft fit into thepulley holes.

The details of the invention herein shown and described may be greatlyvaried by a skilled mechanic without departing from the scope of myinvention as expressed in the claims.

Having thusfully described my invention, what I claim, and desire tosecure by Letters Patent, is

1. In a separable pulley, the combination of the hub having partialtransversely tapered holes as 13, and aremovable section as D having thepartial transversely tapered holes 11, pins as D, consisting of twotapered pins and 16 adapted to fit into the partial holes 13 and 11 tohold the section D in place, and means for holding the pins,substantially as described.

2. In a separable pulley, the combination of f a rim having partialconical holes 20 formed therein, and a removable section of rim havingthe partial conical holes 21 formed in the same, the pins E having twosections adapted to fit into the holes 20 and 21, and means for holdingthe pins securely in place, substantially as described.

3. A separable pulley having a portion of its rim removable, and havingthe partial conical holes 20 and 21 formed in the pulley rim and theremovable portionrespectively, the tapered pins E having a sectionadapted to fit into each of the holes 20 and 21, and an extendingscrew-threaded portion 24, the washer 26 placed upon this extendingscrewthreaded portion 24, and the nuts threaded thereon, whereby theremovable section will be held in place and the face of the pulley leftflush, substantially as described.

1. A separable pulley consisting of the hub A, rim B and arm 0, the hubA having a removable section D, the hub A and the removable section Dhaving mating partial conical holes 13 and 11 on their joining edges,the double conical pins D adapted to fit into these holes 13 and 11, aportion of the rim 13 also being removable, the removable portion of therim and the rim of the pulley having the partial conical mating holes 20and 21 and the double conical pins E fitting in these holes 20 and 21,and means for securing the pins D and E in place, substantially asdescribed.

In testimony whereofI have hereunto set my hand in the presence of twosubscribing witnesses.

ALEXANDER O. HODGE. Witnesses:

WILLIAM ROBERTSON, WILLIAM STEWART.

